Russellbogentoff

I think the Rumour Engine post is something 'floating' and being chained to the ground, perhaps Slaanesh or Shadow Elves? Alternatively, it could be something dragging chains behind it?

I could see this. I have a small 1000 pt army of scourge privateers and am a little surprised they don't have access to more monsters from the old elves, considering their new theme as beastmasters. Something like the hydra and cold one knights would suit this, especially considering they share kits with the chariot and hydra.

A book which includes Duardin, Free People's and Devoted as separate, unique factions that can be used together as well would be excellent, though I may be wish listing because of the Disciples release.

Personally I would love to see a Devoted of Sigmar release! I've got a War Altar, warrior priests and a handful of converted witch hunters I'd love to dust off the shelf! If they did a book combining the three human factions, I would be in heaven. To me, the rumour mill pic looks as though the white/striped areas are definitely the neck of some sort of beast, with the blue areas making up a kind of feathered back/rear. The crossbow seems to be attached to a harness, so I'd agree it's likely a demigryph of some description. The amber wizard rides a turquoise feathered griffin, so it wouldn't be the first.

I agree some of the factions are extremely limited. Im building a Scourge Privateers army, though my gaming group is fine with me taking corsairs as battleline even with additions, as long as most of it fits in the faction. I'm running Doomfire Warlocks, for example. mostly it's because I had the models already, but I honestly think that based on the amount of models relegated to 'legacy' units that the units still included in factions are likely to stay and be expanded on in the same vein as beastclaw raiders.